Shingle-machine



Unirn JOHN D. OHISM, OF ALBANY, NEW YORK.

SHINGLE-MACHINE.

Specification of Letters Patent No. 28,649-, dated June 12, 1860.

To all whom it may concern:

Be it known that I, JOHN D. CHIsM, of Albany, in the county of Albanyand State of New York, have invented a new and useful improvement in themode of constructing apparatus for adjusting and regulating andgagingthe required motion of oscillating or rocking head-blocks whenattached to feed-racks of shingle-machines which work the sliding orrocking headblocks with greater regularity than other contrivances,preventing them from slipping back, and possessing other advantageswhich will be herein clearly and distinctly specified.

The nature of my invention consists in providing a device by whichoscillating head blocks of shingle machines may be adjusted andregulated with accuracy, minuteness and precision of motion.

The various devices now in use as applied to the feed motion ofoscillating head blocks of shingle machines do not operate with thatdegree of accuracy and uniformity so essential to the interests of themanufacture of shingles, &c., as the bevel formed by oscillation variesvery much while in operation, thus producing much irregularity in thetaper as well as thickness of the shingles. Neither do they admit ofcutting shingles of such minute grades of thickness as is required. I amaware that there are several inventions extant which have beenintroduced for the purpose of obviating those difficulties but havefound none to fully answer the expectations.

In the practical operation of this invention and in its adaptation anduse it is not material as to any particular form or construction of afeed rack or block nor the particular manner in which the advance orreverse motion is applied as that may be done in various ways to whichthis invention may be applied. Forthis purpose I construct a head block(prefer cast iron) of any required form or size and provide it with theusual clamps, racks and pawl. At the bottom of this head block I providea chamber formed by a projecting flange attached to the head block. Ithen provide a feed rack with the required notches having at its forwardend a cross bar permanently attached; and I do hereby declare that thefollowing is a true and exact description reference being had to theaccompanying drawings in which- Figure 1, is a perspective frontelevation of a shingle machine, Fig. 2 is a vertical sectional view ofthe same machine with the knife plate elevated. Fig. 3, is a hori-Zontal sectional table view of the required clamps, cam and pawlattached to the feed motion. Fig. 4 is a vertical sectional side view ofthe same machine, preferring this class and form of a knife cuttingmachine by which to represent the nature and object of my invention.Fig. 5 is a horizontal sectional view of my adjustable head block.

F is a section of pitman.

G is the lower chamber of the head block which is of sufcient widthdepth and length for the purpose required. N is a recess in the chamberbeing of sufficient capacity to admit the required oscillating motion inwhich the cross head or bar I. (attached to the feed rack) is placed andsecured with a hinge bolt.

For the purpose of securing any desired taper to the shingle andproducing a uniformity of motion in its operation I insert two setscrewsnear each end of the cross bar I in the outer flange of recess N bywhich the exact amount of oscilating motion required, is regulated asshown by M, M, and it will be seen that by this simple device the utmostprecision of thickness and form of taper is obtained and also theoscillating motion may at any time be arrested and boxes or other stuHmay be manufactured of equal and uniform thickness, and it will also beseen that by this flange recess being inverted and rests over the crossbar I it forms a cover to that portion of the machinery thus protectingit from chips, saw dust, etc. This invention may be attached to andoperated by any of the class of shingle machines here represented or tosawing machines.

I-Iaving ascertained by practical experience that much diiiicultyexisted in regulating the feed motion with any degree of precision orminuteness, for the purpose of obviating that difficulty I have inventedan Aimprovement in a feed lever. This improveable screw operated in ayoke 0r similar device by which the fulcrum of this lever bar iscontracted or expanded as may be required, as shown by IV, in Fig. 4.NeXt and near this adjustable screw is attached the fulcrum of the feedpaWl With the handle bar attached as shown by lo, the lever bar Tresting at its end in an adjustable slotted bar. This paWl or clutch dogis held in its proper position to the feed rack by a spiral springattached to the lower end of the paWl and bar T. It Will be seen by thisarrangement that fulcrum of this pavvl is adjustable both vertically andlaterally by Which the feed motion isvregulated at the will of theoperator with minuteness and the utmost precision and regularity, thusadmitting the operator to manufacture the article required of anythickness however minute the variation.

I desire it to be understood that I do not Wish to confine myself to anyparticular form or construction of a shingle machine nor the manner ofattaching and operating my invention by any particular device for feedmotion, as all this may be done in various Ways by various devices andon differently constructed machines and therefore all letters ofreference appearing upon the accompanying drawings not specificallynoted in this application are nugatory and may be erased.

Having thus described the nature of my invention I do not claim any newdevice as a feeding motion nor do I claim any particular mode or devicefor putting my invention in practical operation as it admits of variousadaptations-but Vhat I claim is my invention and desire to secure byLetters Patent is- The cross bar I as attached to the rack feed bar J inconnection With the recess or chamber N in the oscillating feed h'ead Gall in the manner and for the purpose specilied, and these parts ormeans I only claim when they are connected With the adjustable leverfeed bar T With the lateral adjustable screw l/V and feed pawl attachedto handle U regulated by the spiral spring as represented all for thepurpose and in the manner specified.

JOHN D. CHISM.

Witnesses:

WM. A. ALLEN, JOHN BRENNAN.

